Machine for cutting slots in key blanks



Dec.' 7', 1926.

G. A. LONG MACHINE FOR CUTTING SLOTS IN KEY BLANKS Filed May 1. 1925 3 sheets-sheet 1 ZW J.

. INVENTn ATToRNEr Decvov i 1 l G. A. LONG y CUTTNGKSLOTS IN KEY BLANKS Filed Mair 1925 3 sheets-sheet 2 INI/Enron er I;

` Arm/mfr Dec. 7,1926.- v f 1,609,373

G. A.4 LONG MACHINE FOR CUTTING SLOTS 1N KEY BLANKSv Filed May l. 1925 i 3 Sheets-Sheet 5 TTUHNEY Patented Dec, 7, 1926.

GEORGE atene, or HaRTronnpeonimCTrcUT, Assrelvofa To. GRAY' TELEBHoNnrAY l STATION Coivrranfr,` or HARTFORD. CCNNECTICUT, .a CORPORATION for .CoNNECTr-l CUT.r

ivmoiain'IifroR CUTTING sLoTsfIN KEY-BLANES. i

Application .i'led May 41,l

which the keys can With advantage be put.Y

While I vhave a number of important objects in View, among the'more vital of them 1s theprovision in a machine of the class 'setforth which is accurate 'a'ndpositive in ac'- tion and Whichis rapid in operation.

In the drawings accompanying' andV forming partv of the. present specifications., I have represented in detailan advantageousform of einhodiment of the invention Whichto enable those skilled in theart to practice'the same Will be set forthfully in the following description y l am not restricte'dto this disclosure; .I may depart therefrom in'a number :of re spectsqwithin the scope Vof lthe invention asV defined by the claims succeeding .such description:

Fig. 1 is a front elevation. l l

Fig. 2'is a. side-elevation asseen from the right inFig. 1. I y,

Fig. 3' is a top plan sectional view.

Fig. r4 is a viewas seen from below in Fig. Bof theV left upper end of the machine.

Fig. 5 is ay detail of a key.

Fig. 6 is a sectional detail.

Like characters refer to like parts throughoutl the'several figures of the drawings.

The various parts of the machine may be vsustained by proper frame Work such as that denoted in ageneral Way by 2.

As shown, the frame Work involves a table 3, the upper side of which is reciprocative in the slide 4 which has a tongue 5 (Fig. 2).

The carrier for the keys to be cut is delnoted in a general Way lby 6 (Figs. 1 and 2). The carrier 6 being sustained upon the upper section or plate 6 of a seri-es of superimposed plates mounted on'the slide 4 and to partake of the necessary motion in order that-the proper slotting can be obtained.

1n the construction shown two key blanks vare concurrently slotted as represented by Fig. 5y and it should be noted that none of the keys are the same except the tWo that 1925.- serial CNO. 27,274.

are 'simultaneously slotted; one `of these tfv'vo being usually kept by aconcern suchas the telephone company and the other heing.de-

live-'redto a subscriber. n

The4 ba'seo'f the vmachine supports a stang dard Y jvhich hasfa bearing'- forrotatively supporting va shaft'S vfurnished at anA end,y

the'leftvisV shown in Fig. lof a driver re resented vas a pulley Q'fand'driven lby albe tr 10 which receives its motion from an elec-j tricV motor or something of a similar Chara'cter. As4 shown the shaft 8 car-riesffa Worm 11 in 'a-mesh rvviththe Worm gear 412 "fixed to a shaft 18 'and Whichr'igidly carries the` pinion 14 in mesh withl the spur gear-[L15 which is in mesh with practically ja similar spur gear 16 carried-by the shaft17. Rigid-,

ly carried by the shaft 17` is ja lpinionfltlfiri mesh With a spur gear 1,9; the shaft o'f which has attached to ita cam20 'which yi'ngipa'rts Va rocking vmotion to arocker v241l 'stepped `to the bearing?, the rocker .beingoscillalted'jby the cam 20, ,all as clearl'yshovvn' in Figs. 11 and 2. The carrier 6- is closed into gripping engagement wwith the keys, or rather With the blanks thereof, by' a lever as,22, Fig. 1, which ,has a handlefto facilitate the action in l'question. VWhenthe carrier grips the keysthe carrier isI advanced through the pri-mary action of the cam 20, as will now beset'forth. To 'the rocker 21vis pivoted a rod '23 which" is also connected vviththe 'shaft 24`bearingthe pinion 25 in mesh with the two racks26 and 27; the lower rack 26 being fixed, While the upper rack is rigidly associated With the plates 7" with which is operatively associated the key carrier 6. When, therefore, the rocker 21 is oscillated from the position shown in said Fig. 1 to the right and is then returned the pinion 25 is advanced ycausing it tov rotate and thus feed the rack 2,7 to the right and then backward to the position it is shown as occupying in said Fig. 1. During one reciprocation of the rack 27Vtherefor ltvvo keys are concurrently slotted. Concurrently acting on the` tvvo keys .during their lateralv reciprocation Whensustained by vthe carrier 6 there are concurrently acting on the blanks Y in the present case seven cutters as 28, as

shown clearly in Figs. V1, 2, 3 and 4.l The `cutters are attached to spindles as 29v (Figsf 3 and 4) and they are'i'n staggered relation as clearly shown in said Fig. 3 and they cut variable depths in the blank to obtain' the 2" recast/3 different slots as shown in said Fig. 2. rlhe spindles 29 are sustained by a fixed block 30;

`The spindles 29 are connected by universal joints as 31, as shown in Fig. 3, to spindles 34 which have Worms l35 (Fig. 4) rigid With them and V,Which mesh with Worin gears as 36 fiXedto the shaft 37 supported by a block 38. rlhe shaft 37 has rigid with it the spurv gear 39 in mesh With the pinion40 Which is rigid With a shaft 41 carrying the driven member 42 (Fig. 2 and 3) and `which is connected by a belt`44 With a driver 45.

The spindles 29 extend through superimposed Wedges as 46 and 47. Between the several Wedgesis located a bearing 48 Which sustains a shaftr49 Which carries upon itv levers as 50 (Fig. 4), each lever being furv nished Withv a spring operated detent 51, the

detents traverse the segments as 52 (Fig. 4). Each of the levers 50 is connected by a slot and pin joint the pin being denoted by 55 and being fastened in the upper edge of the Wedge 47. By thev operation of a lever as 50 the Vdepth of a cutter 29 associated there- 'with can be controlled.

Y The shaft 13 is operatively connected byv gearing, denoted in a general Way by 57,

y. With a shaft 17 supported by brackets 59.

The final gear has associated with it the clutch member 60.. It Will be assumed that n the train of gears 57 is being rotated and as a consequence the clutch member 60 isV also turning. The clutch member 61 Will be moved into clutching vengagement with the clutch member 60 by the operationof the hand ylever 62, thus driving the clutching member 61. Vhen' theclutch member 61 engages the clutchV Vmember 60,V the shaft 17 (Fig. 2) With which the clutch member 61 is splined is driveny so that through the train of gears 63v the cam lever'20 is reciprocated to effect the reciprocation of the carrier 6.

,the spindles to'cut various steps in the blank on' the movement of the carrier.

2. ln a machine of the class described the combinationr of a plurality of spindles each having a cutter disposed in staggered order,

a carrier, and means involving tWo slides one Y acting against the other to causev the spinmovement of the carrier.

3. In a machine of the class described the Vconfibinadtion of a plurality of spindles each rdles to out various steps in the blank on the A having a cutter, -duplicates of each. other in Y lstaggered relation, a carrier, means for reciprocating the carrier, and means involving tWov slides one acting against the other to cause the spindles to cut various steps in the blank on the movement of the carrier. i

4. In a machinevof the class ydescribed the combination of a plurality'of spindles each having a cutter in staggered relation With each other, a carrier, means for reciprocating the carrier, a series of levers to act against the spindles to cause'them to cut slots of various depths inthe key blank sus' tained on the carrier, and means involving two' slides one acting against the other to cause the spindles Yto cut various 'steps in the blank on the movement of they carrier. K

In testimony whereof 'I afiiX my signature.

' VGroen A. Loue. Y

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